http://locator.wizards.com for store/event locator. For higher level events (PTQs, GPTs, etc.) select "play" then select "Click here to search for Premier Events". Really, you should just go to MTGMom.com because WotC's decision to force you to use this webapp instead of just giving a chart of all PTQs/GPTs in a season in order makes it far too easy to miss an event.

In case this post gets linked to as a permanent guide for this subreddit, it should be shared with anyone who is visiting this page to read the guide that TheCid is an official judge and is arguably the most knowledgeable person we have around here when it comes to Magic. If he says it, it's truth.

Whoa, hold on a sec. I'm not an official DCI judge any more. I used to be, but when I quit playing due to money/time issues in college, I also quit judging and I've long since lost my official judge certification.

Now that they have the Rules Advisor system that's a much better place for me, I think.